Solid-liquid separation system

Abstract

The utility model provides a solid-liquid separation system, which relates to the technical field of solid-liquid separation and comprises solid-liquid separation equipment and pre-coating equipment, the solid-liquid separation equipment comprises a feeding hole; the pre-coating equipment comprises a tank body, a vacuum feeding machine and a stirring mechanism; the vacuum feeding machine is arranged at the top of the tank body; the stirring mechanism extends into the tank body; the top of the tank body is provided with a liquid inlet, the bottom of the tank body is provided with a liquid outlet, the liquid outlet is communicated with the feed port, and a pump body is arranged between the liquid outlet and the feed port. The vacuum feeding machine generates negative pressure to generate suction force, and quantitative precoating agents are input into the tank body; water in the water pipeline is supplemented into the tank body through the liquid inlet, and meanwhile, the stirring mechanism is started to fully mix the precoating agent with fresh water to form precoating liquid in a specific proportion. After the pre-coating work of the pre-coating layer is completed, the solid-liquid separation equipment enters the steps of feeding filtering, squeezing and back flushing under the control of the controller, and then a sludge filter cake with the water content being lower than 50% can be obtained.

Description

Technical Field

[0001] This utility model relates to the field of solid-liquid separation technology, and in particular to a solid-liquid separation system. Background Technology

[0002] Filtration and filtration equipment is a high-efficiency and energy-saving solid-liquid separation device, widely used in petrochemical, pharmaceutical, food, and environmental protection fields, and suitable for the filtration treatment of various suspensions and emulsions.

[0003] In the initial stage of filtration in pressure filter and filtration equipment, the direct impact and clogging of sticky material particles can damage the filter cloth. Due to the adhesiveness of the material itself, it easily adheres to the filter cloth surface, reducing the filter cloth's permeability. This reduced permeability affects the solid-liquid separation effect and increases the moisture content of the filter cake. During the sludge unloading stage, the stickiness of the material often causes the formed filter cake to adhere tightly to the filter cloth, significantly increasing the difficulty of unloading. If the filter cake is severely adhered to the filter cloth, manual assistance is required for unloading. The sludge cake adhering to the filter cloth increases the difficulty of cleaning the filter cloth, prolongs the cleaning time, increases water consumption, and consequently increases subsequent operating costs. Utility Model Content

[0004] The purpose of this invention is to provide a solid-liquid separation system to solve the technical problem in the prior art where sticky material particles adhere to the surface of the filter cloth, causing a decrease in the water permeability of the filter cloth and an increase in the moisture content of the filter cake.

[0005] The solid-liquid separation system provided by this utility model includes a solid-liquid separation device and a pre-coating device;

[0006] The solid-liquid separation device includes a feed inlet;

[0007] The pre-coating equipment includes a tank, a vacuum feeder, and a mixing mechanism;

[0008] The vacuum feeder is located at the top of the tank, and the stirring mechanism extends into the tank. The top of the tank is provided with a liquid inlet, and the bottom of the tank is provided with a liquid outlet. The liquid outlet is connected to the feed inlet, and a pump is provided between the liquid outlet and the feed inlet.

[0009] Furthermore, the pre-coating equipment also includes a pre-coating agent storage tank; the pre-coating agent storage tank is connected to the inlet of the vacuum feeder.

[0010] Furthermore, the pre-coating equipment also includes a base; both the tank and the pre-coating agent storage box are mounted on the base.

[0011] Furthermore, an observation hole is provided on the top of the tank.

[0012] Furthermore, the stirring mechanism includes a motor and a stirrer;

[0013] The agitator is connected to the shaft of the motor; the agitator is disposed inside the tank, and the motor is mounted on the top of the tank.

[0014] Furthermore, a drain valve is provided between the outlet and the pump body, and a check valve and a pneumatic valve are provided sequentially between the pump body and the inlet.

[0015] Furthermore, a pressure transmitter is provided between the pneumatic valve and the feed inlet.

[0016] Furthermore, the tank is equipped with a liquid level detector.

[0017] Furthermore, the inlet is equipped with an inlet valve.

[0018] Furthermore, the solid-liquid separation system also includes a controller;

[0019] The liquid level detector, the liquid inlet valve, the vacuum feeder, the stirring mechanism, the pump body, and the pneumatic valve are respectively connected to the controller.

[0020] This utility model provides a solid-liquid separation system, including a solid-liquid separation device and a pre-coating device. The solid-liquid separation device includes a feed inlet; the pre-coating device includes a tank, a vacuum feeder, and a stirring mechanism. The vacuum feeder is located at the top of the tank, and the stirring mechanism extends into the tank. The top of the tank has a liquid inlet, and the bottom of the tank has a liquid outlet, which communicates with the feed inlet. A pump is located between the feed inlet and the outlet. The vacuum feeder generates negative pressure to produce suction, feeding a measured amount of pre-coating agent into the tank. Water from the water pipeline is added to the tank through the liquid inlet, while the stirring mechanism is activated to thoroughly mix the pre-coating agent with the fresh water to form a pre-coating liquid in a specific ratio. Under the action of the pump, the pre-coating liquid is transported from the outlet to the feed inlet, entering the solid-liquid separation device from the feed inlet. A thin pre-coating layer is formed on the filter cloth surface of the solid-liquid separation device, and the thickness of the pre-coating layer can be adjusted according to the actual working conditions on site. After the pre-coating layer stabilizes and forms, the pre-coating equipment is shut down under the control of the controller. After the pre-coating work is completed, the solid-liquid separation equipment enters the feeding filtration, pressing, and backflushing steps under the control of the controller to obtain sludge filter cake with a moisture content of less than 50%. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the solid-liquid separation system in one embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the solid-liquid separation system in another embodiment of the present invention.

[0024] Icons: 1 - Pre-coating agent storage tank; 2 - Base; 3 - Stirring mechanism; 4 - Tank body; 5 - Drain valve; 6 - Pump body; 7 - Pneumatic valve; 8 - Check valve; 9 - Liquid level detector; 10 - Vacuum feeder; 11 - Pressure transmitter; 12 - Inlet; 13 - Observation hole. Detailed Implementation

[0025] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0026] This invention provides a solid-liquid separation system. Several embodiments are given below to describe the solid-liquid separation system provided by this invention in detail.

[0027] The solid-liquid separation system provided in this embodiment, such as Figures 1 to 2 As shown, it includes a solid-liquid separation device and a pre-coating device; the solid-liquid separation device includes a feed inlet 12; the pre-coating device includes a tank 4, a vacuum feeder 10 and a stirring mechanism 3; the vacuum feeder 10 is located on the top of the tank 4, and the stirring mechanism 3 extends into the tank 4; the top of the tank 4 is provided with a liquid inlet, and the bottom of the tank 4 is provided with a liquid outlet, which is connected to the feed inlet 12, and a pump 6 is provided between the liquid outlet and the feed inlet 12.

[0028] In one embodiment, the inlet is used to input water into the tank 4. Specifically, the vacuum feeder 10 generates negative pressure to produce suction, inputting a quantitative amount of pre-coating agent into the tank 4; water from the water pipeline is added to the tank 4 through the inlet, and simultaneously the stirring mechanism 3 is activated to fully mix the pre-coating agent with fresh water to form a pre-coating liquid in a specific ratio. Under the action of the pump 6, the pre-coating liquid is transported to the feed inlet 12 after passing through the outlet. The pre-coating liquid enters the solid-liquid separation equipment from the feed inlet 12, forming a thin pre-coating layer on the surface of the filter cloth of the solid-liquid separation equipment. The thickness of the pre-coating layer can be adjusted according to the actual working conditions on site. After the pre-coating layer has stabilized and formed, the pre-coating equipment is shut down under the control of the controller; after the pre-coating work is completed, the solid-liquid separation equipment enters the feeding filtration, pressing, and backflushing steps under the control of the controller to obtain a sludge filter cake with a moisture content of less than 50%.

[0029] A pre-coating liquid is delivered to the solid-liquid separation equipment via a pre-coating device, forming a thin pre-coating layer on the filter cloth surface. This pre-coating increases the filter cloth's permeability, prevents clogging, reduces wear, and extends its service life. Without the pre-coating device, the filter cake obtained from the solid-liquid separation equipment has a moisture content exceeding 60%, while with the pre-coating device, the moisture content is below 50%. The pre-coating device enables deep dewatering of sludge, increasing the operating efficiency of the solid-liquid separation equipment.

[0030] Adding a pre-coating device to a solid-liquid separation system facilitates the filtration of viscous materials and expands the applicable range of media. The pre-coating layer formed on the filter cloth promotes rapid filter cake detachment, enabling automated unloading and reducing unloading time. Without the pre-coating device, the unloading time is 35-45 minutes; with the pre-coating device, it is reduced to 20-30 minutes. This reduces manual unloading, lowering labor costs and intensity. The pre-coating also prevents excessive adhesion of viscous filter cake to the filter cloth, facilitating cleaning, reducing cleaning frequency, lowering water consumption, and reducing operating costs. Furthermore, it extends the lifespan of the filter cloth and improves the efficiency of the filter press and filtration equipment.

[0031] In another embodiment, the inlet is used to input the slurry to be filtered into the tank 4. Specifically, the vacuum feeder 10 generates negative pressure to produce suction, and inputs a quantitative amount of pre-coating agent into the tank 4; the slurry to be filtered flows into the tank 4 through the inlet, and at the same time, the stirring mechanism 3 is activated to mix the pre-coating agent and the slurry to be filtered evenly to form a filter slurry. Under the action of the pump body 6, the filter slurry is transported to the inlet 12 after passing through the outlet. The filter slurry enters the solid-liquid separation equipment from the inlet 12 and forms a filter cake of uniform thickness on the filter cloth surface of the solid-liquid separation equipment; after the pre-coating equipment stops supplying the filter slurry to the solid-liquid separation equipment, the solid-liquid separation equipment enters the pressing and backflushing steps under the control of the controller to obtain a sludge filter cake with a moisture content of less than 50%.

[0032] The pre-coating agent is mixed with the sludge to be filtered through a pre-coating device to form a slurry, which is then transported to the solid-liquid separation equipment for filtration. The viscosity of the slurry is lower than that of the sludge to be filtered, increasing the permeability of the filter cake, preventing filter cloth clogging, reducing filter cloth wear, and extending the service life of the filter cloth. Without the pre-coating device, the moisture content of the filter cake obtained by the solid-liquid separation system is above 60%, while with the pre-coating device, the moisture content is below 50%. The pre-coating device enables deep dewatering of the sludge, increasing the operating efficiency of the solid-liquid separation equipment.

[0033] Adding pre-coating equipment facilitates the filtration of viscous materials, expanding the applicable range of media. The reduced viscosity of the filtered sludge cake allows for rapid detachment, enabling automated unloading and reducing unloading time. Without pre-coating equipment, the unloading time for solid-liquid separation systems is 35-45 minutes; with pre-coating equipment, this is reduced to 20-30 minutes. It also reduces manual unloading operations, lowering labor costs and intensity. Furthermore, it prevents excessive cake adhesion to the filter cloth, facilitating cleaning, reducing cleaning frequency, water consumption, and operating costs. Finally, it extends the lifespan of the filter cloth and improves the efficiency of the filter press and filtration equipment.

[0034] Furthermore, the pre-coating equipment also includes a pre-coating agent storage tank 1; the pre-coating agent storage tank 1 is connected to the inlet of the vacuum feeder 10.

[0035] Pre-coating agent storage box 1 stores pre-coating agent, the raw material of which is expanded perlite powder or diatomaceous earth. Pre-coating agent storage box 1 is a hollow box with an openable lid, which can be used to store pre-coating agent.

[0036] When the vacuum feeder 10 starts, it can transport the pre-coating agent in the pre-coating agent storage tank 1 to the tank 4. The pre-coating agent is mixed with water or slurry to be filtered in the tank 4 according to a preset ratio.

[0037] Furthermore, the pre-coating equipment also includes a base 2; the tank 4 and the pre-coating agent storage box 1 are both installed on the base 2.

[0038] Base 2 is the skid-mounted base 2 for the pre-coating equipment. All other components of the pre-coating equipment are installed and fixed on base 2, forming a pre-coating skid-mounted module. Designing the pre-coating equipment as a skid-mounted unit has the advantages of facilitating transportation, reducing on-site construction work, and saving space.

[0039] The tank 4 and the pre-coating agent storage box 1 can be fixedly connected to the base 2, or they can be detachably connected to the base 2.

[0040] Furthermore, an observation hole 13 is provided on the top of the tank body 4.

[0041] The top of the tank 4 is provided with an observation hole 13 so that the user can check the mixing status of the pre-coating agent with water or the slurry to be filtered.

[0042] Furthermore, the stirring mechanism 3 includes a motor and a stirrer; the stirrer is connected to the motor shaft; the stirrer is installed inside the tank 4, and the motor is installed on the top of the tank 4.

[0043] The motor is located outside the tank 4 and is fixedly installed on the top of the tank 4. When the motor starts, it drives the agitator to rotate around the axis of the motor shaft, thereby mixing the pre-coating agent with water or the slurry to be filtered evenly.

[0044] The mixing mechanism 3 operates intermittently. When the pre-coating work is being carried out, the controller automatically starts the mixing mechanism 3. The mixing mechanism 3 mixes the pre-coating agent with water or the slurry to be filtered. After the pre-coating work is completed, the input of the mixed pre-coating agent with water or the slurry to be filtered into the solid-liquid separation equipment is stopped, and the mixing mechanism 3 automatically stops running under the control of the controller.

[0045] Furthermore, a drain valve 5 is provided between the outlet and the pump body 6, and a check valve 8 and a pneumatic valve 7 are provided between the pump body 6 and the feed inlet 12 in sequence.

[0046] The outlet and inlet are connected by a pipeline, and the pump body 6 is installed on the pipeline.

[0047] The drain valve 5 is installed on the pipeline between the outlet and the inlet of the pump body 6. The drain valve 5 is a manually controlled valve and is in the open state. When the pump body 6 is under maintenance, the drain valve 5 is in the closed state, which facilitates the maintenance of the pump body 6.

[0048] Pump body 6, check valve 8, pneumatic valve 7, and feed inlet 12 are arranged sequentially. Check valve 8 and pneumatic valve 7 are located on the pipeline between the outlet of pump body 6 and feed inlet 12. When pre-coating the solid-liquid separation equipment is required, pneumatic valve 7 is opened, and the pre-coating equipment inputs the mixed pre-coating agent and water or slurry to be filtered into the solid-liquid separation equipment. When pre-coating the solid-liquid separation equipment is stopped, pneumatic valve 7 is closed, and the pre-coating equipment stops inputting the mixed pre-coating agent and water or slurry to be filtered into the solid-liquid separation equipment.

[0049] The check valve 8 can protect the pump body 6 and ensure its safe and stable operation, and also facilitates the maintenance of the check valve 8.

[0050] When the solid-liquid separation equipment is started, the automatic operation button is pressed. Under the control of the controller, the stirring mechanism 3 starts automatically, followed by the pump body 6 and the pneumatic valve 7. The mixed liquid in the tank 4 enters the pump body 6 through the drain valve 5. Under the action of the pump body 6, the mixed liquid in the tank 4 is transported to the feed inlet 12 after passing through the check valve 8 and the pneumatic valve 7. The mixed liquid in the tank 4 enters the solid-liquid separation equipment. When water is introduced into the tank 4, a thin pre-coating layer can be formed on the surface of the filter cloth. The thickness of the pre-coating layer can be adjusted according to the actual working conditions on site. After the pre-coating layer has stabilized and formed, the controller controls the pre-coating equipment to automatically shut down. The running time of the pump body 6 is automatically controlled by the time controller. When the time set value is reached, the pre-coating layer on the filter cloth will stabilize and form. The controller will automatically shut down the pump body 6 and the pneumatic valve 7, and control the stirring mechanism 3 to stop working. When the slurry to be filtered is fed into tank 4, when the liquid level in tank 4 reaches the upper limit, the controller controls the stirring mechanism 3 to start. Subsequently, the controller controls the pump body 6 and the pneumatic valve 7 to open. Under the action of the pump body 6, the slurry is transported to the solid-liquid separation equipment through the check valve 8 and the pneumatic valve 7, and a filter cake of uniform thickness is formed on the surface of the filter cloth. The running time of the pump body 6 is controlled by the filtration pressure in the solid-liquid separation equipment. When the filtration pressure reaches the preset pressure, the filter cake on the filter cloth in the solid-liquid separation equipment will be stably formed. The controller will then control the pump body 6 and the pneumatic valve 7 to close, and control the stirring mechanism 3 to stop running. After the solid-liquid separation equipment is pre-coated, the solid-liquid separation equipment enters the pressing and backflushing steps under the control of the controller to obtain a sludge filter cake with a moisture content of less than 50%.

[0051] Furthermore, a pressure transmitter 11 is provided between the pneumatic valve 7 and the feed port 12.

[0052] The pressure transmitter 11 is installed on the pipeline between the pneumatic valve 7 and the feed port 12. The pressure transmitter 11 has local display and remote transmission functions, and can monitor the pipeline pressure in real time on site. It can also calculate the filtration pressure in the solid-liquid separation equipment based on the data from the pressure transmitter 11 and control the solid-liquid separation equipment to stop filtration.

[0053] Furthermore, the inlet is equipped with an inlet valve. When the inlet valve is open, water or slurry to be filtered can be introduced into the tank 4.

[0054] Furthermore, tank 4 is equipped with a liquid level detector 9.

[0055] When water is introduced into tank 4, the inlet valve opens, allowing water to enter tank 4. The level detector 9 continuously monitors the level inside tank 4. When the level inside tank 4 reaches the preset upper limit, the level detector 9 sends a signal to the controller, which then closes the inlet valve. When the level inside tank 4 detected by the level detector 9 reaches the preset lower limit, the level detector 9 sends a signal to the controller, which then controls the vacuum feeder 10 to deliver pre-coating agent into tank 4. When the vacuum feeder 10 has run for a preset time, the controller stops the vacuum feeder 10, opens the inlet valve to deliver water into tank 4, and activates the stirring mechanism 3.

[0056] When the slurry to be filtered is fed into the tank 4, the inlet valve opens, allowing the slurry to be filtered to enter the tank 4. The level detector 9 continuously monitors the level in the tank 4. When the level in the tank 4 reaches the preset upper limit, the level detector 9 sends a signal to the controller, which then controls the inlet valve to close. When the level in the tank 4 detected by the level detector 9 reaches the preset lower limit, the level detector 9 sends a signal to the controller, which then controls the vacuum feeder 10 to deliver the pre-coating agent into the tank 4. When the vacuum feeder 10 has run for a preset time, the controller controls the vacuum feeder 10 to stop running, controls the inlet valve to open, and delivers the slurry to be filtered into the tank 4. The controller also controls the stirring mechanism 3 to start.

[0057] The liquid level detector 9 has local display and remote transmission functions, which can not only observe the liquid level changes on site in real time, but also realize remote control through the liquid level detector 9.

[0058] Furthermore, the solid-liquid separation system also includes a controller; the liquid level detector 9, the liquid inlet valve, the vacuum feeder 10, the stirring mechanism 3, the pump body 6, and the pneumatic valve 7 are respectively connected to the controller.

[0059] The controller can control the level detector 9, the inlet valve, the vacuum feeder 10, the stirring mechanism 3, the pump body 6, and the pneumatic valve 7 to control the start, stop, or open / close of each component.

[0060] When the liquid level in tank 4 reaches the preset lower limit, the controller controls the vacuum feeder 10 to start. The time controller controls the vacuum feeder 10 to stop. When the vacuum feeder 10 runs for the preset running time, the controller controls the vacuum feeder 10 to stop running.

[0061] The vacuum feeder 10 can automatically add pre-coating agent, reducing the working time and labor intensity of manual feeding. The amount of pre-coating agent used can be precisely controlled through the operating program, avoiding waste and reducing operating costs.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A solid-liquid separation system, characterized in that, This includes solid-liquid separation equipment and pre-coating equipment; The solid-liquid separation device includes a feed inlet; The pre-coating equipment includes a tank, a vacuum feeder, and a mixing mechanism; The vacuum feeder is located at the top of the tank, and the stirring mechanism extends into the tank. The top of the tank is provided with a liquid inlet, and the bottom of the tank is provided with a liquid outlet. The liquid outlet is connected to the feed inlet, and a pump is provided between the liquid outlet and the feed inlet.

2. The solid-liquid separation system according to claim 1, characterized in that, The pre-coating equipment also includes a pre-coating agent storage tank; the pre-coating agent storage tank is connected to the inlet of the vacuum feeder.

3. The solid-liquid separation system according to claim 2, characterized in that, The pre-coating equipment also includes a base; both the tank and the pre-coating agent storage box are mounted on the base.

4. The solid-liquid separation system according to claim 1, characterized in that, An observation hole is provided on the top of the tank.

5. The solid-liquid separation system according to claim 1, characterized in that, The stirring mechanism includes a motor and a stirrer; The agitator is connected to the shaft of the motor; the agitator is disposed inside the tank, and the motor is mounted on the top of the tank.

6. The solid-liquid separation system according to claim 1, characterized in that, A drain valve is provided between the outlet and the pump body, and a check valve and a pneumatic valve are provided between the pump body and the inlet in sequence.

7. The solid-liquid separation system according to claim 6, characterized in that, A pressure transmitter is provided between the pneumatic valve and the feed inlet.

8. The solid-liquid separation system according to claim 6, characterized in that, The tank is equipped with a liquid level detector.

9. The solid-liquid separation system according to claim 8, characterized in that, The inlet is equipped with an inlet valve.

10. The solid-liquid separation system according to claim 9, characterized in that, The solid-liquid separation system also includes a controller; The liquid level detector, the liquid inlet valve, the vacuum feeder, the stirring mechanism, the pump body, and the pneumatic valve are respectively connected to the controller.

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